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<p>Charcoal rot caused by <i>Macrophomina phaseolina</i> is a serious disease affecting coriander (<i>Coriandrum sativum</i>), especially under drought condition and poor soil fertility. This study was conducted to study the effect of arbuscular mycorrhizal fungi (AMF) including <i>Glomus coronatum</i>, <i>G. mosseae</i>, <i>G. intraradices</i>, and <i>G. etunicatum</i>, on enhancing coriander resistance to <i>M. phaseolina</i> (isolate MPC-2). Results revealed that AMF application alone or combined with the half recommended nitrogen fertilizer dose, significantly reduced both charcoal rot incidence and severity in treated plants compared to untreated control. The application of AMF significantly reduced disease incidence to 11% and 17.7% and disease severity to 6.1% and 8.7% in coriander plants infected with <i>M. phaseolina</i>, compared with the untreated control, which recorded 44% and 47% incidence and 31% and 32% severity during the 2023 and 2024 seasons, respectively. Applying nitrogen fertilizer at half the recommended rate along with AMF in infected soil caused a slight, non-significant increase in disease incidence and severity compared to AMF application alone. However, this combination significantly reduced disease incidence and severity relative to the untreated control in both seasons. The disease severity was higher under the recommended nitrogen dose than in untreated control. Application of AMF to both healthy and <i>M. phaseolina</i>-infected coriander plants enhanced growth by promoting root establishment, increasing plant height and stimulating the development of more leaves, branches and inflorescence compared to untreated plants. Consequently, this improvement led to higher fresh weight, dry weight and seed yield per plant. The combination of AMF and nitrogen fertilization enhanced the levels of chlorophyll a, b, carotenoids, total soluble solids, carbohydrates, proteins, phenolics, and antioxidants compared to the application of each treatment individually. Although application of the fungicide Rizolex T50% significantly suppressed the disease compared to AMF treatment, it showed less impact on coriander vegetative and physiological traits. The use of AMF is recommended as an alternative and environmentally safe approach that can be integrated with other management strategies to control charcoal rot in coriander.</p>

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Arbuscular mycorrhizal fungi confers resistance to Macrophomina phaseolina in coriander under different nitrogen fertilizer rates

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Marzouk R. Abdel-Latif,
  • Abdelrazek S. Abdelrhim,
  • Ranya M. S. El-Ashmony,
  • Yasmin M. R. Abdellatif,
  • Hanaa A. H. Armanious,
  • Ismail A. A. Tantawy,
  • Mahmoud Elsayed,
  • Abeer S. Alqurashi,
  • Hatim M. Al-Yasi,
  • Esmat F. Ali,
  • Abdelmonim Ali Ahmad

摘要

Charcoal rot caused by Macrophomina phaseolina is a serious disease affecting coriander (Coriandrum sativum), especially under drought condition and poor soil fertility. This study was conducted to study the effect of arbuscular mycorrhizal fungi (AMF) including Glomus coronatum, G. mosseae, G. intraradices, and G. etunicatum, on enhancing coriander resistance to M. phaseolina (isolate MPC-2). Results revealed that AMF application alone or combined with the half recommended nitrogen fertilizer dose, significantly reduced both charcoal rot incidence and severity in treated plants compared to untreated control. The application of AMF significantly reduced disease incidence to 11% and 17.7% and disease severity to 6.1% and 8.7% in coriander plants infected with M. phaseolina, compared with the untreated control, which recorded 44% and 47% incidence and 31% and 32% severity during the 2023 and 2024 seasons, respectively. Applying nitrogen fertilizer at half the recommended rate along with AMF in infected soil caused a slight, non-significant increase in disease incidence and severity compared to AMF application alone. However, this combination significantly reduced disease incidence and severity relative to the untreated control in both seasons. The disease severity was higher under the recommended nitrogen dose than in untreated control. Application of AMF to both healthy and M. phaseolina-infected coriander plants enhanced growth by promoting root establishment, increasing plant height and stimulating the development of more leaves, branches and inflorescence compared to untreated plants. Consequently, this improvement led to higher fresh weight, dry weight and seed yield per plant. The combination of AMF and nitrogen fertilization enhanced the levels of chlorophyll a, b, carotenoids, total soluble solids, carbohydrates, proteins, phenolics, and antioxidants compared to the application of each treatment individually. Although application of the fungicide Rizolex T50% significantly suppressed the disease compared to AMF treatment, it showed less impact on coriander vegetative and physiological traits. The use of AMF is recommended as an alternative and environmentally safe approach that can be integrated with other management strategies to control charcoal rot in coriander.